基于LCC-HVDC和VSC-HVDC的混合双极直流输电系统的建模及仿真分析  

Modeling and Simulation of Hybrid Bipolar DC Transmission System Based on LCC-HVDC and VSC-HVDC

作　　者：高淑萍[1] 朱航舰 张保会[2] 宋国兵[2] GAO Shu-ping(College of Eleetrieal ＆ Control Engineering,Xi＇an University of Seienee and Teehnology,Xi＇an 710054,China)

机构地区：[1]西安科技大学电气与控制工程学院,陕西西安710054 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《河南机电高等专科学校学报》2018年第2期1-6,共6页Journal of Henan Mechanical and Electrical Engineering College

基　　金：国家自然科学基金(NSFC)资助项目(51777166)

摘　　要：近年来,我国传统换相型高压直流输电(LCC-HVDC)技术在电力系统中已经发展成熟;由于电力电子器件在实际工程应用中越来越成熟甚至达到完美状态,电压源换流器型高压直流输电(VSC-HVDC)也应用到了现代电网中。由于LCC-HVDC和VSC-HVDC有各自的优点与不足,为了发挥两者的优势,对由LCC-HVDC和VSC-HVDC两个子系统分别位于上下两极所组成的混合双极直流输电系统(Hybrid Bipolar-HVDC)进行了进一步的分析。文章介绍了Hybrid Bipolar-HVDC系统内部包含的一些基本结构,对LCC和VSC的主电路和其控制电路、在PSCAD环境下正极LCC-HVDC和负极VSC-HVDC的主电路和控制电路分别进行了具体分析,最后用PSCAD对Hybrid Bipolar-HVDC进行了仿真,并分析了其稳定运行的状态。In recent years, the traditional Commutated Converter High Voltage Direct Current（LCC-HVDC） has become mature in China＇s power system. As power electronics become more sophisticated and even perfect in practical engineering applications, Voltage Source Converter based High Voltage Direct Current（VSC-HVDC） has also been applied to modern power grids. Because of the advantages and disadvantages of LCC-HVDC and VSC-HVDC, in order to exert their advantages, hybrid Bipolar（HVDC） system consisting of two subsystems, LCC-HVDC and VSC-HVDC for further analysis. In this paper, some basic structures included in Hybrid Bipolar-HVDC system will be introduced firstly. Then, the main circuits of LCC and VSC and their control circuits will be analyzed separately. Then, the relationship between the positive LCC-HVDC and the negative VSC-HVDC Main circuit and control circuit. Finally, PSCAD is used to simulate Hybrid Bipolar-HVDC and to analyze its stable operation.

关 键 词：换相型高压直流输电 电压源换流器型高压直流输电 混合双极直流输电 PSCAD软件 仿真模型建立 

分 类 号：TM721.1[电气工程—电力系统及自动化]